CN220714865U - Liquid level control system of continuous vacuum crystallizer - Google Patents
Liquid level control system of continuous vacuum crystallizer Download PDFInfo
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- CN220714865U CN220714865U CN202322420171.7U CN202322420171U CN220714865U CN 220714865 U CN220714865 U CN 220714865U CN 202322420171 U CN202322420171 U CN 202322420171U CN 220714865 U CN220714865 U CN 220714865U
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- 239000007788 liquid Substances 0.000 title claims abstract description 186
- 239000000463 material Substances 0.000 claims abstract description 52
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- 238000013461 design Methods 0.000 abstract description 4
- 230000000630 rising effect Effects 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 5
- 230000001276 controlling effect Effects 0.000 description 5
- 238000002425 crystallisation Methods 0.000 description 5
- 230000008025 crystallization Effects 0.000 description 5
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- 238000000034 method Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000005086 pumping Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000011112 process operation Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000009835 boiling Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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- 230000006872 improvement Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model provides a liquid level control system of a continuous vacuum crystallizer, which comprises a vacuum crystallizer (1), wherein a steam outlet (2) is arranged at the top of the vacuum crystallizer, a cold material liquid outlet (3) is arranged at the bottom of the vacuum crystallizer, a hot material liquid inlet (4) is arranged on the side wall of the vacuum crystallizer, a liquid level control mechanism communicated with the vacuum crystallizer is arranged at the cold material liquid outlet, the liquid level control mechanism comprises a cold material liquid discharge pipe (5) with one end connected with the cold material liquid outlet and a sleeve (6) sleeved at the other end of the cold material liquid discharge pipe, the upper port of the sleeve is communicated with the atmosphere, the lower port of the sleeve is lower than the outlet of the cold material liquid discharge pipe, and a liquid level sensor (8) is arranged on the wall of the sleeve. The utility model has simple structure, ingenious design and good stability, realizes the control of the liquid level of the vacuum crystallizer by controlling the liquid level of the sleeve, and can not cause major production faults caused by the liquid level in the vacuum crystallizer rising to the steam outlet.
Description
Technical Field
The utility model relates to the technical field of vacuum crystallization, in particular to a liquid level control system of a continuous vacuum crystallizer.
Background
A continuous vacuum crystallizer is a chemical device for continuous operation, and is mainly used for crystallizing solute in solution in crystal form. The working principle of the continuous vacuum crystallizer is as follows: the hot feed liquid is continuously fed into the vacuum crystallizer by the feed pump, and the vacuum crystallizer has extremely high vacuum, so that part of water in the hot feed liquid is evaporated, heat of the hot feed liquid is taken away, cooling crystallization of the hot feed liquid is realized, and cooled cold feed liquid is continuously pumped out by the discharge pump.
In the continuous vacuum crystallization process, the liquid level control in the vacuum crystallizer is an important link of production automation, and is very important for ensuring the smooth progress of the crystallization process, the stability of the product quality and the improvement of the production efficiency. In order to control the liquid level in the vacuum crystallizer, a liquid level sensor is generally arranged in the vacuum crystallizer, and the pumping speed of the discharge pump is controlled by a signal fed back by the liquid level sensor so as to adjust the liquid level of the crystallizer. In actual process operation, there are the following problems: because the vacuum crystallizer is a high vacuum container, and the feed liquid in the crystallizer is boiled vigorously, the measurement accuracy of the liquid level sensor is easily disturbed by the generated spray, and runaway often occurs; once the liquid level sensor fails, the liquid level in the vacuum crystallization tank rises instantly, a large amount of spray and feed liquid enter the steam pipe, and serious production faults are caused.
The utility model discloses a "crystallizer liquid level control device", its bulletin number is CN215614937A, this is through setting up motor, connecting block and screw rod, the effect of guaranteeing stopper transmission efficiency has been reached, when the inside material of middle jar flows into the crystallizer body inside through discharge opening and connecting pipe, the generator sends the radiation source, and be accepted by the receiver, thereby the purpose that the detected liquid level signal is located the liquid level of crystallizer body, the liquid level deviation and deviation change rate are calculated to the liquid level signal that has detected, external controller carries out fuzzification fuzzy reasoning and decision-making, after the regulating factor calculates, external controller control motor work, the motor drives the action wheel and rotates, the action wheel passes through the drive belt and drives the connecting block through the follow driving wheel and rotates, screw rod and screw take place relative movement, thereby the purpose of driving stopper removal has been reached, the moving efficiency of stopper has been guaranteed, the stability to liquid level control has been improved, product quality has been guaranteed, the gap between stopper and the discharge opening has reached the purpose of being convenient for adjust the inside liquid level of crystallizer body, the liquid level accords with the liquid level needs of assurance. However, the liquid level control device of this patent is relatively complex in structure, requires a plurality of components and a transmission system to cooperate with each other, is prone to failure, and is inconvenient to maintain.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, an object of the present utility model is to provide a continuous vacuum crystallizer liquid level control system, which is used for solving the problems that the existing continuous vacuum crystallizer liquid level control sensor is easily affected by liquid splashing in the vacuum crystallizer, which results in poor precision, uncontrolled liquid level control, instant rise of liquid level in the vacuum crystallizer, and great amount of spray and feed liquid enter a steam pipe, which causes serious production failure.
To achieve the above and other related objects, the present utility model is achieved by comprising the following technical solutions.
The utility model provides a liquid level control system of a continuous vacuum crystallizer, which comprises a vacuum crystallizer, wherein the top of the vacuum crystallizer is provided with a steam outlet, the bottom of the vacuum crystallizer is provided with a cold material liquid outlet, the side wall of the vacuum crystallizer is provided with a hot material liquid inlet, the cold material liquid outlet is provided with a liquid level control mechanism communicated with the vacuum crystallizer, the liquid level control mechanism comprises a cold material liquid discharge pipe with one end connected with the cold material liquid outlet and a sleeve sleeved at the other end of the cold material liquid discharge pipe, the upper port of the sleeve is communicated with the atmosphere, and the lower port of the sleeve is lower than the outlet of the cold material liquid discharge pipe, so that the outlet of the cold material liquid discharge pipe is positioned below the liquid level of the sleeve; a liquid level sensor is arranged on the wall of the sleeve; the liquid level sensor is used for detecting liquid level information of the sleeve and outputting a signal, and the liquid discharge speed of the cold feed liquid discharge pipe is regulated based on the signal.
The liquid level control system of the continuous vacuum crystallizer has simple structure and ingenious design, the outer pipe is communicated with the atmosphere by sleeving the sleeve outside the lower end of the cold material liquid discharge pipe, and the inner pipe is inserted below the liquid level of the outer pipe; the liquid level sensor is arranged on the wall of the sleeve, and the liquid level of the vacuum crystallizer is controlled by controlling the liquid level of the sleeve through the liquid level sensor.
The liquid level control principle of the liquid level control system of the continuous vacuum crystallizer is as follows:
the pressure produced by the level difference between the vacuum crystallizer level and the jacket = atmospheric pressure-absolute pressure within the vacuum crystallizer; therefore, the liquid level of the vacuum crystallizer can be controlled by controlling the liquid level of the sleeve.
Because the sleeve works under normal pressure, the boiling of materials can not occur, the sleeve is a very stable working condition, and the liquid level of the sleeve is easy to detect and control. The continuous vacuum crystallizer liquid level control system has good stability, even if a liquid level sensor fails, when the liquid level of the sleeve exceeds the pipe orifice of the sleeve, cold feed liquid can overflow from the pipe orifice and flow back to the accident slot, and the liquid level in the vacuum crystallizer cannot rise to a steam outlet to cause serious production faults.
Preferably, the cavity of the vacuum crystallizer is communicated with the sleeve through the cold material liquid discharge pipe to form a communication structure, so that the accuracy of liquid level control of the vacuum crystallizer is ensured.
Preferably, the hot feed liquid inlet is connected with a hot feed liquid feed pump through a pipeline, and the hot feed liquid feed pump is controlled.
Preferably, a cold material liquid discharge pump is connected to the lower port of the sleeve.
Preferably, the diameter of the lower port of the sleeve is gradually reduced to form a necking structure, which is favorable for the rapid rise of the liquid level in the sleeve, ensures that the outlet of the cold material liquid discharge pipe is positioned below the liquid level of the sleeve, and improves the precision of liquid level control.
As described above, the continuous vacuum crystallizer liquid level control system of the present utility model has the following advantageous effects: the vacuum crystallizer liquid level control device has the advantages of simple structure, ingenious design and good stability, and can control the liquid level of the vacuum crystallizer by controlling the liquid level of the sleeve, so that the liquid level in the vacuum crystallizer cannot rise to a steam outlet to cause serious production faults.
Drawings
Fig. 1 shows a schematic structure of a liquid level control system of a continuous vacuum crystallizer according to an embodiment.
Fig. 2 shows an enlarged view at a in fig. 1.
Fig. 3 shows a schematic structure of the continuous vacuum mold of the comparative example.
Description of the reference numerals
1. Vacuum crystallizer
2. Steam outlet
3. Cold material liquid outlet
4. Hot feed liquid inlet
5. Cold feed liquid discharge pipe
6. Casing pipe
7. Liquid level sensor
8. Hot feed liquid feed pump
9. Cold feed liquid discharge pump
10. Necking structure
Detailed Description
Further advantages and effects of the present utility model will become apparent to those skilled in the art from the disclosure of the present utility model, which is described by the following specific examples.
Please refer to fig. 1 to 3. It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for illustration purposes only and should not be construed as limiting the utility model to the extent that it can be practiced, since modifications, changes in the proportions, or otherwise, used in the practice of the utility model, are not intended to be critical to the essential characteristics of the utility model, but are intended to fall within the spirit and scope of the utility model. Also, the terms such as "upper," "lower," "left," "right," "middle," and "a" and the like recited in the present specification are merely for descriptive purposes and are not intended to limit the scope of the utility model, but are intended to provide relative positional changes or modifications without materially altering the technical context in which the utility model may be practiced.
Examples
As shown in fig. 1, the embodiment of the application provides a liquid level control system of a continuous vacuum crystallizer, which comprises a vacuum crystallizer 1, wherein the top of the vacuum crystallizer is provided with a steam outlet 2, the bottom of the vacuum crystallizer is provided with a cold material liquid outlet 3, the side wall of the vacuum crystallizer is provided with a hot material liquid inlet 4, the cold material liquid outlet is provided with a liquid level control mechanism communicated with the vacuum crystallizer, as shown in fig. 2, the liquid level control mechanism comprises a cold material liquid discharge pipe 5 with one end connected with the cold material liquid outlet and a sleeve 6 sleeved at the other end of the cold material liquid discharge pipe, the upper port of the sleeve is communicated with the atmosphere, and the lower port of the sleeve is lower than the outlet of the cold material liquid discharge pipe, so that the outlet of the cold material liquid discharge pipe is positioned below the liquid level of the sleeve; the diameter of the lower port of the sleeve is gradually reduced to form a necking structure 10, and the cavity of the vacuum crystallizer is communicated with the sleeve through a cold material liquid discharge pipe. The liquid level sensor 7 is arranged on the wall of the sleeve, and the liquid level sensor 7 is used for detecting liquid level information of the sleeve and outputting a signal, and the liquid discharge speed of the cold liquid discharge pipe is regulated based on the signal. The hot feed liquid inlet is connected with a hot feed liquid feeding pump 8 through a pipeline, and the lower port of the sleeve is connected with a cold feed liquid discharging pump 9.
The embodiment also provides a liquid level control method of the continuous vacuum crystallizer based on the system, which controls the liquid level of the vacuum crystallizer by controlling the liquid level of the sleeve. Liquid level information of the sleeve 6 is acquired in real time through the liquid level sensor 7 and signals are output, the pumping speed of the cold material liquid discharge pump 10 is regulated according to the signals, the liquid discharge speed of the cold material liquid discharge pipe is regulated, and the liquid level of the vacuum crystallizer is controlled. And discharging the cold material liquid, and then, separating out a crystallized product in separation equipment.
In actual process operation, the continuous vacuum crystallizer liquid level control system of the embodiment has good stability, even if a liquid level sensor fails, when the liquid level of the sleeve exceeds the pipe orifice of the sleeve, cold feed liquid can overflow from the pipe orifice and flow back to the accident slot, and serious production faults caused by the fact that the liquid level in the vacuum crystallizer rises to a steam outlet can not be caused.
Comparative example
As shown in fig. 3, the comparative example of the present application adopts a conventional continuous vacuum crystallizer, which comprises a vacuum crystallizer 1, wherein the top of the vacuum crystallizer is provided with a steam outlet 2 and a liquid level sensor 8 for detecting liquid level information of the vacuum crystallizer and outputting a signal, the liquid discharge speed of a cold material liquid discharge pipe is regulated based on the signal, the bottom is provided with a cold material liquid outlet 3, the side wall is provided with a hot material liquid inlet 4, the hot material liquid inlet is connected with a hot material liquid feeding pump 8 through a pipeline, and the lower port of the sleeve is connected with a cold material liquid discharge pump 9.
The liquid level control method of this comparative example is as follows: liquid level information of the vacuum crystallizer is obtained in real time through the liquid level sensor 7, a corresponding switch signal is output, and the pumping speed of the cold material liquid discharge pump 9 is controlled, so that the liquid level of the vacuum crystallizer is regulated.
In actual process operation, this comparative example has the following problems: because the vacuum crystallizer is a high vacuum container, and the liquid in the vacuum crystallizer is severely boiled, the liquid level measurement precision of the liquid level sensor 7 is easily disturbed by the generated spray, and a correct liquid level information signal cannot be output, so that the pumping speed of the cold material liquid discharge pump 9 is not regulated and controlled timely, the liquid level in the vacuum crystallizer is instantaneously increased, and a large amount of spray and liquid are sprayed out from the steam outlet 2, so that serious production faults are caused.
In conclusion, the vacuum crystallizer liquid level control device is simple in structure, ingenious in design and good in stability, the liquid level of the vacuum crystallizer is controlled by controlling the liquid level of the sleeve, and serious production faults caused by the fact that the liquid level in the vacuum crystallizer rises to a steam outlet can not be caused. Therefore, the utility model effectively overcomes various defects in the prior art and has high industrial utilization value.
The above embodiments are merely illustrative of the principles of the present utility model and its effectiveness, and are not intended to limit the utility model. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the utility model. Accordingly, it is intended that all equivalent modifications and variations of the utility model be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (5)
1. The continuous vacuum crystallizer liquid level control system is characterized by comprising a vacuum crystallizer (1), wherein the top of the vacuum crystallizer is provided with a steam outlet (2), the bottom of the vacuum crystallizer is provided with a cold material liquid outlet (3), the side wall of the vacuum crystallizer is provided with a hot material liquid inlet (4), the cold material liquid outlet is provided with a liquid level control mechanism communicated with the vacuum crystallizer, the liquid level control mechanism comprises a cold material liquid discharge pipe (5) with one end connected with the cold material liquid outlet and a sleeve (6) sleeved at the other end of the cold material liquid discharge pipe, the upper port of the sleeve is communicated with the atmosphere, and the lower port of the sleeve is lower than the outlet of the cold material liquid discharge pipe, so that the outlet of the cold material liquid discharge pipe is positioned below the liquid level of the sleeve; the wall of the sleeve is provided with a liquid level sensor (7).
2. The continuous vacuum crystallizer liquid level control system of claim 1, wherein: the cavity of the vacuum crystallizer is communicated with the sleeve through a cold material liquid discharge pipe.
3. The continuous vacuum crystallizer liquid level control system of claim 1, wherein: the hot feed liquid inlet is connected with a hot feed liquid feeding pump (8) through a pipeline.
4. The continuous vacuum crystallizer liquid level control system of claim 1, wherein: the lower port of the sleeve is connected with a cold material liquid discharge pump (9).
5. The continuous vacuum crystallizer liquid level control system of claim 1, wherein: the diameter of the lower port of the sleeve is gradually reduced to form a necking structure (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322420171.7U CN220714865U (en) | 2023-09-06 | 2023-09-06 | Liquid level control system of continuous vacuum crystallizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322420171.7U CN220714865U (en) | 2023-09-06 | 2023-09-06 | Liquid level control system of continuous vacuum crystallizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220714865U true CN220714865U (en) | 2024-04-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322420171.7U Active CN220714865U (en) | 2023-09-06 | 2023-09-06 | Liquid level control system of continuous vacuum crystallizer |
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| Country | Link |
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| CN (1) | CN220714865U (en) |
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2023
- 2023-09-06 CN CN202322420171.7U patent/CN220714865U/en active Active
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